BenQ LX720 User manual

Digital Projector
User Manual
LX720 / LW720 / LH720 V1.00

2 Warranty and Copyright information
Warranty and Copyright information
Limited warranty
BenQ warrants this product against any defects in material and workmanship, under normal usage and
storage.
Proof of purchase date will be required with any warranty claim. In the event this product is found to be
defective within the warranty period, BenQ's only obligation and your exclusive remedy shall be
replacement of any defective parts (labor included). To obtain warranty service, immediately notify the
dealer from which you purchased the product of any defects.
Important: The above warranty shall be void if the customer fails to operate the product in accordance
with BenQ's written instructions, especially the ambient humidity must be in-between 10% and 90%,
temperature in-between 0°C and 35°C, altitude lower than 4920 feet, and avoiding to operate the
projector in a dusty environment. This warranty gives you specific legal rights, and you may have other
rights which vary from country to country.
For other information, please visit www.BenQ.com.
Copyright
Copyright © 2018 by BenQ Corporation. All rights reserved. No part of this publication may be
reproduced, transmitted, transcribed, stored in a retrieval system or translated into any language or
computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical,
manual or otherwise, without the prior written permission of BenQ Corporation.
Disclaimer
BenQ Corporation makes no representations or warranties, either expressed or implied, with respect
to the contents hereof and specifically disclaims any warranties, merchantability or fitness for any
particular purpose. Further, BenQ Corporation reserves the right to revise this publication and to make
changes from time to time in the contents hereof without obligation to notify any person of such
revision or changes.
*DLP, Digital Micromirror Device and DMD are trademarks of Texas Instruments. Others are
copyrights of their respective companies or organizations.
Patents
Please go to http://patmarking.benq.com/ for the details on BenQ projector patent coverage.

3Table of Contents
Table of Contents
Warranty and Copyright information ................................................................................ 2
Important safety instructions .............................................................................................. 4
Introduction .......................................................................................................................... 7
Shipping contents ....................................................................................................................................... 7
Projector exterior view ............................................................................................................................ 8
Controls and functions.............................................................................................................................. 9
Positioning your projector ................................................................................................. 12
Choosing a location .................................................................................................................................12
Obtaining a preferred projected image size....................................................................................... 13
Shifting the projection lens ....................................................................................................................16
Mounting the projector ..........................................................................................................................16
Adjusting the projected image ..............................................................................................................17
Connection .......................................................................................................................... 19
Connecting smart devices ...................................................................................................................... 21
Connecting InstaShow (WDC10) ........................................................................................................21
Operation ............................................................................................................................ 22
Starting up the projector ........................................................................................................................22
Calibrating LumiExpert ........................................................................................................................... 23
Using the menus .......................................................................................................................................23
Securing the projector ............................................................................................................................ 25
Switching input signal ...............................................................................................................................26
Controlling the projector via LAN ...................................................................................................... 27
Upgrading firmware via LAN................................................................................................................. 28
Controlling the projector remotely via a web browser .................................................................28
Shutting down the projector .................................................................................................................31
Direct power off ......................................................................................................................................31
Menu operation ................................................................................................................... 32
Basic menu ...............................................................................................................................................32
Advanced menu ..................................................................................................................................... 34
Maintenance ........................................................................................................................ 42
Care of the projector ..............................................................................................................................42
Light information ......................................................................................................................................43
Troubleshooting ................................................................................................................. 45
Specifications ...................................................................................................................... 46
Projector specifications ..........................................................................................................................46
Dimensions ................................................................................................................................................47
Timing chart............................................................................................................................................... 48

4 Important safety instructions
Important safety instructions
Your projector is designed and tested to meet the latest standards for safety of information technology
equipment. However, to ensure safe use of this product, it is important that you follow the instructions
mentioned in this manual and marked on the product.
1. Please read this manual before you
operate your projector. Save it for future
reference.
2. Do not look straight at the projector
lens during operation. The intense light
beam may damage your eyes.
3. Refer servicing to qualified service
personnel.
4. Always open the lens shutter (if any) or
remove the lens cap (if any) when the
projector light source is on.
5. The light source becomes extremely hot
during operation. Allow the projector to cool
for approximately 45 minutes prior to
removing the light source assembly for
replacement.
6. In some countries, the line voltage is NOT
stable. This projector is designed to operate
safely within a mains voltage between 100 to
240 volts AC, but could fail if power cuts or
surges of ±10 volts occur. In areas where
the mains voltage may fluctuate or cut
out, it is recommended that you
connect your projector through a power
stabilizer, surge protector or
uninterruptible power supply (UPS).
7. Do not block the projection lens with any
objects when the projector is under
operation as this could cause the objects to
become heated and deformed or even cause a
fire. To temporarily turn off the light source,
use the blank function.
8. Do not operate light source beyond the rated
light source life. Excessive operation of light
source beyond the rated life could cause them
to break on rare occasions.

5Important safety instructions
9. Never replace the light source assembly or
any electronic components unless the
projector is unplugged.
10. Do not place this product on an unstable cart,
stand, or table. The product may fall,
sustaining serious damage.
11. Do not attempt to disassemble this projector.
There are dangerous high voltages inside
which may cause death if you should come
into contact with live parts. The only user
serviceable part is the light source which has
its own removable cover.
Under no circumstances should you ever
undo or remove any other covers. Refer
servicing only to suitably qualified professional
service personnel.
12. Do not block the ventilation holes.
- Do not place this projector on a blanket, bedding or
any other soft surface.
- Do not cover this projector with a cloth or any other
item.
- Do not place inflammables near the projector.
If the ventilation holes are seriously
obstructed, overheating inside the projector
may result in a fire.
13. Always place the projector on a level,
horizontal surface during operation.
- Do not use if tilted at an angle of more than 10
degrees left to right, nor at angle of more than 15
degrees front to back. Using the projector when it is
not fully horizontal may cause a malfunction of, or
damage to, the light source.
14. Do not stand the projector on end vertically.
Doing so may cause the projector to fall over,
causing injury or resulting in damage to the
projector.
15. Do not step on the projector or place any
objects upon it. Besides probable physical
damage to the projector, doing so may result
in accidents and possible injury.
16. When the projector is under operation, you
may sense some heated air and odor from its
ventilation grill. It is a normal phenomenon
and not a product defect.

6 Important safety instructions
17. Do not place liquids near or on the projector.
Liquids spilled into the projector may cause it
to fail. If the projector does become wet,
disconnect it from the power supply's power
outlet and call BenQ to have the projector
serviced.
18. This product is capable of displaying inverted
images for ceiling/wall mount installation.
19. This apparatus must be earthed.
20. Do not place this projector in any of the
following environments.
- Space that is poorly ventilated or confined. Allow at
least 50 cm clearance from walls and free flow of air
around the projector.
- Locations where temperatures may become
excessively high, such as the inside of a car with all
windows rolled up.
- Locations where excessive humidity, dust, or cigarette
smoke may contaminate optical components, shorten
the projector's life span and darken the image.
- Locations near fire alarms
- Locations with an ambient temperature above 40°C /
104°F
- Locations where the altitudes are higher than 3000 m
(10000 feet).
3000 m
(10000 feet)
0 m
(0 feet)

7Introduction
Introduction
Shipping contents
Carefully unpack and verify that you have all of the items shown below. If any of these items are missing,
please contact your place of purchase.
Standard accessories
Optional accessories
Replacing the remote control batteries
1. Press and open the battery cover, as illustrated.
2. Remove the old batteries (if applicable) and install two
AAA batteries. Make sure that the positive and negative
ends are positioned correctly, as illustrated.
3. Replace the battery cover until it clicks into place.
Projector Remote control with
batteries User manual CD
Quick Start Guide Warranty card* Power cord
VGA cable
• The supplied accessories will be suitable for your region, and may differ from those illustrated.
• *The warranty card is only supplied in some specific regions. Please consult your dealer for detailed information.
1. 3D glasses
2. Dust filter
3. QCast mirror dongle/QCast video streaming
dongle/InstaShow (WDC10)

8 Introduction
Projector exterior view
• Avoid leaving the remote control and batteries in an excessive heat or humid environment like the kitchen,
bathroom, sauna, sunroom or in a closed car.
• Replace only with the same or equivalent type recommended by the battery manufacturer.
• Dispose of the used batteries according to the manufacturer's instructions and local environment regulations for
your region.
• Never throw the batteries into a fire. There may be danger of an explosion.
• If the batteries are dead or if you will not be using the remote control for an extended period of time, remove the
batteries to avoid damage to the remote control from possible battery leakage.
1. Lens cover
2. Vent (air exhaust)
3. IR remote sensor
4. Adjuster feet
5. Projection lens
6. Focus ring
7. Zoom ring
8. Light sensor
9. Lens shift adjustment knob
10. External control panel
(See Controls and functions on page 9.)
11. QCast (HDMI 2/MHL-input port for HDMI
dongle)
12. USB cable (A to Micro B type) connect to the
power port of HDMI wireless dongle
13. Vent (air inlet)
14. Speaker
15. Wall mount holes
16. Security bar
17. AC power jack
18. Kensington anti-theft lock slot
19. USB Type A port
20. Audio input jack
Audio output jac
21. Microphone
22. Audio (L/R) input jack
23. HDMI 1 input port
24. Video input jack
25. S-Video input jack
26. RGB (PC) signal input jack
27. RS-232 control port
28. RGB (PC) signal output jack
29. RJ-45 LAN input jack
30. USB Mini-B port
31. 12V trigger
32. PW02 mount holes
33. InstaShow mount holes
2
3
4
5
16
7
8
9
10
11
13
14
4
15
16
15
15
15
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
4
12
32
33

9Introduction
Controls and functions
Projector & Remote control
1. POWER
Toggles the projector between standby mode
and on.
ON/ Off
Toggles the projector between standby mode
and on.
2. POWER indicator light/TEMPerature
warning light/LIGHT indicator light
(See Indicators on page 44.)
3. IR remote sensor
4. SOURCE
Displays the source selection bar.
5. BACK
Goes back to previous OSD menu, exits and
saves menu settings.
6. Arrow keys ( , , , )
When the On-Screen Display (OSD) menu is
activated, these keys are used as directional
arrows to select the desired menu items and
to make adjustments.
Keystone keys ( , )
Displays the keystone correction page.
Volume keys /
Decreases or increase the projector volume.
7. ECO BLANK
Used to hide the screen picture.
Do not block the projection lens from
projecting as this could cause the blocking
object to become heated and deformed or
even cause a fire.
5
4
6
8
7
9
10
3
2
1
All the key presses described in this document
are available on the remote control or projector.
1
6
5
10
9
7
8
4
11
12
13
14
15
16
17
18
20
212
22
19

10 Introduction
8. OK
Confirms the selected On-Screen Display
(OSD) menu item.
9. AUTO
Automatically determines the best picture
timings for the displayed image when PC signal
(analog RGB) is selected.
10. MENU
Turns on the On-Screen Display (OSD) menu.
11. Source selection button: PC 1/HDMI
1/VIDEO/HDMI 2/MHL/NETWORK
Selects PC 1/HDMI 1/VIDEO/HDMI
2/MHL/NETWORK input source for display.
12. LASER
Emits visible laser pointer light for
presentation purposes.
13.
Toggles projector audio between on and off.
14. INFO
Displays the projector information.
15. MHL
Operates for MHL function.
16. ZOOM+/ZOOM-
Magnifies or reduces the projected picture
size.
17. PAGE +/PAGE-
Operate your display software program (on a
connected PC) which responds to page
up/down commands (like Microsoft
PowerPoint).
18. FREEZE
Freezes the projected image.
19. LIGHT MODE
Displays the Light Mode menu for selecting a
suitable light operating mode.
20. QUICK INSTALL
Quickly selects several functions to adjust the
projected image and displays the test pattern.
21. ASPECT
Selects the display aspect ratio.
22. PICTURE
Selects the picture mode.

11Introduction
Controlling your smart device with the remote control
When the projector projects the content
from your MHL compatible smart device,
you can use the remote control to
control your smart device.
To enter the MHL mode, press and hold
AUTO for 3 seconds. The following
buttons are available for controlling your
smart device: Arrow keys ( , , ,
), MENU, BACK, OK.
To leave the MHL mode, press and hold
AUTO for 3 seconds.
Remote control effective range
The remote control must be held at an angle within 30 degrees perpendicular to the projector's IR
remote control sensor(s) to function correctly. The distance between the remote control and the
sensor(s) should not exceed 8 meters (~ 26 feet).
Make sure that there are no obstacles between the remote control and the IR sensor(s) on the
projector that might obstruct the infra-red beam.
When the projector is under MHL mode, the keypad on the projector should be with the same definition of the keys
on the remote control.
• Operating the projector from the front • Operating the projector from the top
Approx.+30º
Approx.+30º

12 Positioning your projector
Positioning your projector
Choosing a location
Before choosing an installation location for your projector, take the following factors into consideration:
• Size and position of your screen
• Electrical outlet location
• Location and distance between the projector and the rest of your equipment
You can install your projector in the following ways.
After turning on the projector, go to Advanced Menu - Settings > Projector Installation >
Projector Installation and press / to select a setting.
You can also use QUICK INSTALL on the remote control to access this menu.
1. Front Table
Select this location with the projector placed on
the table in front of the screen. This is the most
common way to position the projector for quick
setup and portability.
2. Rear Table
Select this location with the projector placed on
the table behind the screen. Note that a special
rear projection screen is required.
3. Front Ceiling
Select this location with the projector suspended
upside-down in front of the screen. Purchase the
BenQ Projector Ceiling/Wall Mount Kit from your
dealer to mount your projector.
4. Rear Ceiling
Select this location with the projector suspended
upside-down from behind the screen. Note that a
special rear projection screen and the BenQ
Projector Ceiling/Wall Mount Kit are required for
this installation location.

13Positioning your projector
Obtaining a preferred projected image size
The distance from the projector lens to the screen, the zoom setting (if available), and the video format
each factors in the projected image size.
Projection dimensions
LX720
• The screen aspect ratio is 4:3 and the projected picture is in a 4:3 aspect ratio
For example, if you are using a 120-inch screen, the recommended projection distance is 5681 mm.
• If your measured projection distance is 7500 mm, the closest match in the "Projection distance (mm)"
column is 7587 mm. Looking across this row shows that a 160'' (about 4.0 m) screen is required.
Screen size Projection distance (mm)
Diagonal H (mm) W (mm) Min distance Average Max distance
Inch mm (max. zoom) (min. zoom)
30 762 457 610 1093 1395 1696
40 1016 610 813 1468 1871 2273
50 1270 762 1016 1844 2347 2850
60 1524 914 1219 2220 2823 3426
80 2032 1219 1626 2972 3776 4580
100 2540 1524 2032 3724 4729 5733
120 3048 1829 2438 4476 5681 6886
140 3556 2134 2845 5228 6634 8040
160 4064 2438 3251 5980 7587 9193
180 4572 2743 3658 6731 8539 10346
200 5080 3048 4064 7483 9492 11500
220 5588 3353 4470 8235 10444 12653
250 6350 3810 5080 9363 11873 14383
270 6858 4115 5486 10115 12826 15536
300 7620 4572 6096 11243 14255 17266
All measurements are approximate and may vary from the actual sizes.
BenQ recommends that if you intend to permanently install the projector, you should physically test the projection
size and distance using the actual projector in situ before you permanently install it, so as to make allowance for this
projector's optical characteristics. This will help you determine the exact mounting position so that it best suits your
installation location.
H
WProjection distance
Center of lens
Screen
4:3 Screen diagonal
Offset

14 Positioning your projector
LW720
• The screen aspect ratio is 16:10 and the projected picture is in a 16:10 aspect ratio
For example, if you are using a 120-inch screen, the recommended projection distance is 4816 mm.
• If your measured projection distance is 5500 mm, the closest match in the "Projection distance (mm)"
column is 5627 mm. Looking across this row shows that a 140'' (about 3.5 m) screen is required.
Screen size Projection distance (mm)
Diagonal H (mm) W (mm) Min distance Average Max distance
Inch mm (max. zoom) (min. zoom)
30 762 404 646 911 1166 1421
40 1016 538 862 1232 1571 1910
50 1270 673 1077 1554 1977 2400
60 1524 808 1292 1875 2383 2890
80 2032 1077 1723 2518 3194 3870
100 2540 1346 2154 3160 4005 4849
120 3048 1615 2585 3803 4816 5829
140 3556 1885 3015 4445 5627 6809
160 4064 2154 3446 5088 6439 7789
180 4572 2423 3877 5731 7250 8768
200 5080 2692 4308 6373 8061 9748
220 5588 2962 4739 7016 8872 10728
250 6350 3365 5385 7980 10089 12197
300 7620 4039 6462 9586 12116 14646
All measurements are approximate and may vary from the actual sizes.
BenQ recommends that if you intend to permanently install the projector, you should physically test the projection
size and distance using the actual projector in situ before you permanently install it, so as to make allowance for this
projector's optical characteristics. This will help you determine the exact mounting position so that it best suits your
installation location.
H
WProjection distance
Center of lens
Screen
16:10 Screen diagonal
Offset

15Positioning your projector
LH720
• The screen aspect ratio is 16:9 and the projected picture is in a 16:9 aspect ratio
For example, if you are using a 120-inch screen, the recommended projection distance is 4713 mm.
If your measured projection distance is 5500 mm, the closest match in the "Projection distance (mm)"
column is 5507 mm. Looking across this row shows that a 140'' (about 3.5 m) screen is required.
Screen size Projection distance (mm)
Diagonal H (mm) W (mm) Min distance Average Max distance
Inch mm (max. zoom) (min. zoom)
30 762 374 664 891 1140 1389
40 1016 498 886 1205 1537 1869
50 1270 623 1107 1520 1934 2348
60 1524 747 1328 1834 2331 2828
80 2032 996 1771 2463 3125 3787
100 2540 1245 2214 3092 3919 4746
120 3048 1494 2657 3721 4713 5704
140 3556 1743 3099 4350 5507 6663
160 4064 1992 3542 4979 6301 7622
180 4572 2241 3985 5608 7095 8581
200 5080 2491 4428 6237 7889 9540
220 5588 2740 4870 6866 8683 10499
250 6350 3113 5535 7809 9873 11937
300 7620 3736 6641 9382 11859 14335
All measurements are approximate and may vary from the actual sizes.
BenQ recommends that if you intend to permanently install the projector, you should physically test the projection
size and distance using the actual projector in situ before you permanently install it, so as to make allowance for this
projector's optical characteristics. This will help you determine the exact mounting position so that it best suits your
installation location.
H
WProjection distance
Center of lens
Screen
16:9 Screen diagonal
Offset

16 Positioning your projector
Shifting the projection lens
Mounting the projector
If you intend to mount your projector, we strongly recommend that you use a proper fitting BenQ
projector mounting kit and that you ensure it is securely and safely installed.
If you use a non-BenQ brand projector mounting kit, there is a safety risk that the projector may fall
down due to an improper attachment through the use of the wrong gauge or length screws.
Before mounting the projector
• Purchase a BenQ projector mounting kit from the place you purchased your BenQ projector.
• BenQ recommends that you also purchase a separate Kensington lock compatible security cable and
attach it securely to both the Kensington lock slot on the projector and the base of the mounting
bracket. This will perform the secondary role of restraining the projector should its attachment to the
mounting bracket become loose.
• Ask your dealer to install the projector for you. Installing the projector on your own may cause it to
fall and result in injury.
• Take necessary procedures to prevent the projector from falling off such as during an earthquake.
• The warranty doesn’t cover any product damage caused by mounting the projector with a non-BenQ
brand projector mounting kit.
• Consider the surrounding temperature where the projector is ceiling/wall mounted. If a heater is used,
the temperature around the ceiling/wall may be higher than expected.
• Read the user manual for the mounting kit about the range of torque. Tightening with torque
exceeding the recommended range may cause damage to the projector and subsequently falling off.
• Make sure the power outlet is at an accessible height so that you can easily shut down the projector.
• Please stop turning the afjustment knob when you hear a clicking sound indicating the the knob has reached its
limit. Over-turning the knob may cause damage.
1V
LX720 LW720 LH720
min. 0.15V 0.125V 0.16V
max. 0.39V 0.25V 0.3V
Desk-front
projection

17Positioning your projector
Ceiling/Wall mount installation diagram
Adjusting the projected image
Adjusting the projection angle
If the projector is not placed on a flat surface or the
screen and the projector are not perpendicular to
each other, the projected image becomes
trapezoidal. You can screw the adjuster feet to
fine-tune the horizontal angle.
To retract the feet, screw the adjuster feet in a
reverse direction.
Do not look into the lens while the light source is on. The strong light from the light source may cause damage to
your eyes.
Ceiling/Wall mount screw: M4
(Max L = 25 mm; Min L = 20 mm)
339.5
242.0
216.8
235.7
215.5
149.5
228.0
131.5
235.7
Unit: mm

18 Positioning your projector
Auto-adjusting the image
In some cases, you may need to optimize the picture quality. To do this, press AUTO. Within 3
seconds, the built-in Intelligent Auto Adjustment function will re-adjust the values of Frequency and
Clock to provide the best picture quality.
The current source information will be displayed in the corner of the screen for 3 seconds.
Fine-tuning the image size and clarity
Correcting 2D keystone
2D Keystone function enables a wider projector installation area compared to conventional projectors
with limited positioning in front of the screen.
To correct this, you will need to manually correct it following one of these steps.
1. Do one of the following steps to display the 2D keystone
correction page.
• Press / on the projector or remote control.
• Press QUICK INSTALL on the remote control. Press to
highlight 2D Keystone and press OK.
• Go to Advanced Menu - Display > 2D Keystone and
press OK.
2. After the 2D Keystone correction page displays. Press / to to adjust vertical values. Press /
to adjust horizontal values.
Adjusting Corner Fit
Manually adjust four corners of the image by setting the horizontal and vertical values.
1. Do one of the following steps to display the corner fit page.
• Press QUICK INSTALL on the remote control. Press to
highlight Corner Fit and press OK.
• Go to Advanced Menu - Display > Corner Fit and press
OK.
2. After the Corner Fit correction page displays. Press / to
to adjust vertical values. Press / to adjust horizontal values.
This function is only available when PC signal (analog RGB) is selected.
Adjust the projected image to the size that you
need using the zoom ring.
Sharpen the image by rotating the focus ring.

19Connection
Connection
When connecting a signal source to the projector, be sure to:
1. Turn all equipment off before making any connections.
2. Use the correct signal cables for each source.
3. Ensure the cables are firmly inserted.
• In the connections above, some cables may not be included with the projector (see Shipping contents on page 7).
They are commercially available from electronics stores.
• The connection illustrations are for reference only. The rear connecting jacks available on the projector vary with
each projector model.
• Many notebooks do not turn on their external video ports when connected to a projector. Usually a key combo
like FN + function key with a monitor symbol turns the external display on/off. Press FN and the labeled function
key simultaneously. Refer to your notebook's documentation to find your notebook's key combination.
• If the selected video image is not displayed after the projector is turned on and the correct video source has been
selected, check that the video source device is turned on and operating correctly. Also check that the signal cables
have been connected correctly.
8
1
4
21
56
11
10
37
7
9
10
11
Notebook or
desktop computer
VGA cable
VGA to DVI-A cable
USB cable
Component Video to VGA
(D-Sub)
adapter cable
S-Video cable
Video cable
Audio cable
Audio L/R cable
USB cable (A to Micro B type)
connect to the power port of
HDMI wireless dongle
HDMI cable
HDMI wireless dongle
1
2
3
4
5
6
7
8
9
10
11
Speakers
Monitor
Smart device
A/V device

20 Connection
You need only connect the projector to a video source device using just one of the connecting methods,
however each provides a different level of video quality.
Connecting audio
The projector has built-in mono speaker(s) which are designed to provide basic audio functionality
accompanying data presentations for business purposes only. They are not designed for, nor intended
for stereo audio reproduction use as might be expected in home theater or home cinema applications.
Any stereo audio input (if provided), is mixed into a common mono audio output through the projector
speaker(s).
The built-in speaker(s) will be muted when the AUDIO OUT jack is connected.
Te r m i n a l Picture quality
HDMI/MHL Best
Component Video (through RGB
input) Better
S-Video Good
Video Normal
• The projector is only capable of playing mixed mono audio, even if a stereo audio input is connected.
• If the selected video image is not displayed after the projector is turned on and the correct video source has been
selected, check that the video source device is turned on and operating correctly. Also check that the signal cables
have been connected correctly.